Reg wrote,

Richard, thanks for the reminder.

Yes, the Beverage and other long-wire terminated antennas, although having
lots of L and C, exhibit (ideally) no signs of resonance yet have purely
constant vs frequency resistive feedpoint impedances.

They are all transmission lines which radiate because the spacing between
conductors is an appreciable fraction, or more, of a wavelength, one of the
conductors being whatever the local environment consists of.

Their equivalent lumped circuit networks come under a class of
'constant-resistance' networks commonly found in design of filters and
equalisers.

The most simple example of a constant-resistance network is a capacitor in
series with a resistor, both in parallel with an inductor in series with a
resistor. When all 4 components have the same value in ohms (R) then the
input resistance is a constant resistance R from DC to infinity.
----
Reg, G4FGQ


Since the reactive components change reactance with frequency, Reg's network
may be a little hard to realize in practice. Try making the inductance equal
to
R^2*C Reg. You might have better luck. You also might want to review
Everitt's
take on this subject, starting on page 284 of the second edition of his book,
_Communication Engineering_. His ideas are quite enlightening.

73,
Tom Donaly, KA6RUH